knudsen



Oct; 16, 1923.

C. H. KNUDSEN INTERNAL COMBUSTION ENGINE 2 Sheets-Sheet 1 Original Filed April 26, 1920 I INVENTOR Carl K721462502 Oct. 16, 1923. 1,470,752 C. H. KNUDSEN INTERNAL COMBUSTION ENGINE Original Filed April 26, 1920' 2 sheets-sheet 2 described and claimed. a

Patented Oct. 16, 1923.

um'ren ngs 1,470,752 PATENT OFFICE.

CARL n. KNUDSEN, or BROOKLYN, NEW YORK, ASSIGNOR TO THE KNUDSE-N MOTOR I CORPORATION, OF WILMINGTON, DELAWARE, A CORPORATION or DELAWA E.

INTERNAL-COMBUSTION' ENGINE.

Application n1ed'Apri1.26,'l920, Serial K 3761548. Renewed September 30,192 2 Serial No. 591,666.

To all whom it may concern."

Be it known that I, CARL H. KNUDsEN, a citizen of the United States, and residing at Brooklyn, in the county of Kings and State ofN-ew York, have invented certain new anduseful Improvements in Internal- Combustion Engines, of which the follow-- ing is a specification, such as will enable those skilled in the art to which it apper tains to make and use the same.

This invention relates to internal combustion engines and particularly to' what" are known as. fuel oil engines designed tobe' used for marine and siniilar. purposes, and the object of the invention is to provide an engine of the classspecified of a high coin pression type which is so made as to'simplify the construction of such engines thus materi" 'allyreducing the cost ofthe' manufacture of the same ya furtherobject' being to pro; ide' a two-cycle 'V-type engine having a single compressionand combustionchamher, one of thecylinders acting as an intake or scavenger cylinder and the other as an exhaust cylinder; a further object being to provide "an engine of the class and for the purpose specified with means for pumping air into the cylinders and crank cases of the engine to increase the pressure of the air in said cylinders and crank cases beyond the atmospheric pressure to provide for a more perfect scavenging actionpand with these and other Objects in View the invention con 'sists in an engine Of'the'class and for the purpose specified which is simple in'- constructlonand OPBIfltlOIlfiIlCl efiicient in use and constructed and operated-as hereinafter The invention described and claimed here in is an improvement on that shown and described in a prior application filed b'y'llle May 7,1919, Serial No.'295,3 8 5, and isifully disclosed in-the followingspecification,- of

j which'th'e accompanying drawing forms" part,"in which thei'separate parts of my improvement are designated by suitabl'e refer- 1 ence charactersin each of-the views,' and in improved engine;

' Figfl isa transverse section'alyiew' of two of the cylinders and V casesof my Fig. 2 a side view of the construction as shownin F1g. l;f i

Fig. ,3 a plan view offthe construction shown in'Figs liand 2:

Fig. 4 an enlarged detail view of thelower the relative positions of the piston in the.

scavenger and exhaust cylinders. lnFigs l to 3 inclusive, I have shown twoof the cylinders and crank cases of my improved engine, but it willbeunderstood. I that any number of such cylinders and crank cases may be employed in the construction of a complete enginefand'in said. figures I have shown at 1O and ll-two crank shafts Of'the engine, which are spaced apart and extend parallel one with the other. The crank shaft passes into and through a crankcase 12 carrying a cylinder fl3, an d "the crank shaft 11 passesinto and through a crankcase 1 lcarryi'ng a -cylinder 15.' The crank cases- 12 and '14; are placed in corn munication through a port or passage 16 having'suitable air inlet valves 17. The tops oi the'cylindersl3 and areclosed' by a cylinder'head 18, having acombustion chamber l9'which' communi'cate's'wi'th both of the cylinders 13 a'nd l5, and" the cylinder head '18 is provided-with a suitable fuel injecting device 20 through which fuel is adapted to be sprayed into the combustion" chamber 19 in the usual manner.

Mountedin the'cylinder 13 isa piston 21 having a connecting rod 22 secured to one of the cranks of-the crank shaft 10 in'the usual manner, and mounted in the cylinder 15 isapiston '23 having a connecting rod 24 which connects with a crank of the crank shaft 11! The piston 21in the cylinder 13 is proor passages 25fwhichlopen inwardly and outwardly through said piston as'clearly shown in'Fig. 5, and these'ports or passages are adapted to register with similar ports or passages 26 in the cylinder 13. The cyl; in-derjli is also provided with other or intake ports or passages 27 si-milar to the po'r tsfor passages 26 butlocated at a mode terinineddistance above the ports or pas- V sages 26 and placed'in commun cation thereon the line 5 5.

with by an annular by-pass 28 in the wall or the cylinder It will be seen from the foregoing. description that when the piston 21 is in theposition shown in- Fig. 1 of the drawing, the air underslight pressurein the crank cases 12 and 14 is free to passithrough the .26 into the ann'u ar -by pass 28 and into 'the'cylinder 13 through the intake ports or orts or passages 25 and passages 27 and thus through the cylinder '1 head 18 and cylinder 15, and to be dis charged from the cylinder through a plurality otfannularly arranged exhaust ports or passages 29 in communication with v arr-exhaust port 30 inth'e cylinder 15. This construction provldes a periect scavenging action; and. will thoroughly clean out the cylinders 13 and 15 as well as the combuschamber 19.

I *The piston'23 is provided adjacent to the lowerend thereof with afplurality of an Moan the crank. shafts 10 and. 11 V are fly-wheels andfidgespectively, and mounted ben-u-larly arranged. ports or passages31, which are shown in detailin FigrAl of the drawing, and these ports or passages openoutwardly. and inwardly through the piston and are so constructed as to direct the a r passed therethrough upwardly into the 23-, as indicated by the arrow is in Fig.

41. ZVVhen the piston 23' is inits raised position, the-ports or passages 31 will register with air intake ports or passages 32. in the cylinder 15,]8aid ports or passages con1- municati with anaair intake port 33.

-on one end portion ofeach of tweemthe adjacent faces of said fly-wheel is a trietion disk or roller 36, which: is

mounted on shaft of an air pump de- Yicegfii supported in suitable brackets 38, which are mounted in connection with the crank cases'm and, 14. The air pump deor roller 36 topump theair into the crank cases 12and li-when the piston 23 is in its I raised position, or the sports 31 thereof in i llineiwith theairintake )orts or passages 32 otsaitlcylinder device increasing-the pressure of theair inthe crank cases 12 and14 beyond the. atmospheric pressure, whereby when the pistons 21 and 23j'mov'e into the' position-shown in Fig.1 a perfect scavenging action will b eproduced and. a fresh chargeot air supph to theu'cylinders-lii -;and 15-, which airis compressed jtoahigh 7 degree in the: upward movement of. the pislens 21 and 28, thus producing a highcompression engine of' the class described...

7 pressure of air therein.

I also preferably 'advance the crankof, i

this,as will be apparent, will also aidv in Y the scavenging action of the engine and will permit of a thorough cleaningout of the cylinders and cylinder head.

- It will be apparent that while Ifhave' shown but two cylinders, or one pair of cyl inders, of an engine that the complete engine will be composed of-a series or predetermined. number of such pair of cylinders, each pair of which will be constructed in the same manner as the single pair herein-shown and described, and-coupled. with and op eratedfby the crank shafts 10 and 11; in the usual manner, and as the various dfltails of the complete engine formno part of this invention they have notbeen shown nor de,

scribed, the distinctive ;features consisting the'particular method of producing the scavenging action, the "introduction of air into the crank cases 12 and 14 by a pump or similar device to increase the pressure of the air in said crank cases, and thead vance.

ment ofthe crank on the crank shaft which operates the piston in the exhaust cylinder, and while I have shown certain details of construction for carrying .my invention into effect, it will be understood that I am not necessarily limited to theseedetails and various changes therein and modifications thereof may be made, withinthe scope of the appended claims, without departlng from the spirit of my inventionor. sacrificing its advantagesf f V i Havin f fully described "my invention,

whatlc aim as new and desireto secure by Letters "Patent, is

1; In an engine'of the class described, a

pair of cylinders connected by a cylinder r head having a, combustion chamber in oommunicatioirwith said cylinder, ajcrank case and in opera tiyeconne'ction' with .saidcrank shafts, and means "for passing air under 2.'In an engine of the class de scribed fa "at the bottom' of each ofsaid cylinders,- means for placing saidicrankcases. in com pressurefintoaind through: oneof stiidfpistons and cylinders, and into the crank cases" of the separate cylinders; to ,iinclease the V pair of cylinders connected by a cylinder head having a combustion chamber in comffco munication with said cylinders, a} crank. case [at'the-bottom of each of said cylinders and in' communication with. each other, crank shafts passed through. said crankc'ases, pistons in said. cylinders and, in operative con-- nection with said crank shafts, means where.

by in the upward movement of said pistons airwill be, sucked into said crankcases'and means for admitting air under. pressure into said crank'cases through one of said pistons when said piston is in itsuppermost position. i g

3. X V-type engine of the class described comprising a pair .of cylinders, a cylinder head having a combustion chamber placed in communication with each of said cylinders, crank cases at the bottom of said cylinders having a port or passage for placing said crank cases in communicationgione of said cylinders being provided with intake ports or passages and the other of said cy'linders-with exhaust ports or passages, a pis-- ton mounted in said first named cylinder and adapted to control the intake ports or passages the-rein, means insaid piston and said cylinder whereby air under pressure in said crank cases is adapted to pass through said;

piston and cylinder, and into said cylinder above the piston through saidintake ports or passages, a piston inthe second named cylinder and adapted'to controlthe exhaust ports or passages therein, and means in said last named piston and saidcylinder wherebyair under pressure may be supplied to said crank cases through said piston in one posi-' tion thereof.

4. An engine of the class described comprising a pair of cylinders joined by a cylinder head having a combustion chamber in communication with said cylinders, crank cases at the bottom of said cylinders and in communication with each other, crank shafts passedthrough said crank'cases, pistons in said cylinders and in operative connection with the cranks of said crank. shafts, flywheels mounted on said crank shafts, an air pump device, means for operating said air pump device through said fly-wheels,

-means for placing said pump device in communication with one of said cylinders, and

means in said cylinder and .in the piston mounted therein whereby in one position of said piston air maybe forced into said crank cases by said pump device.

5. An engine of the class described comf prising-a pair of. cylinders joined by a cylinder head having a combustion chamberin communicat on with said Cyl1IiCl61S,-CI'a11k cases at the bottom of said cylindersand in communication with each other, crank shafts passed'through sa d crank cases, pistons in said cylinders and in operative connection with'tlie'cranks of said'crank shafts, flywheels mounted on said crank shafts, an

air pump device, means for operating said air pump device; through said fly-wheels, means for placing said pump device in communication with the crank case end portion of one of said cylinders, means in said cylinder and in the piston mounted therein whereby in one position of said piston air may be forced into said crank cases by said pump device, and means in the other of said pistons and the cylinder thereof where by under pressure in said crank cases'is adapted to'pass throughsaid piston and into, said cylinder through intake ports or passa es]. I r

1361 n engineiofthe class described com prising apair ofccylinders joined by a cylinder, head having a combustion chamber in, communication with said cylinders, crank .ca ses atfthe bottom of said cylinders and in communicationwith each other, crank shafts passed through said crank cases, pistons in with the cranks of said crank shafts, flywheels mounted on said crank shafts, an air .pump device, means for operating said air pump device through said fiy-wlieels,means for placing said pump device in communication with the crank case end portion of one of'said cylinders, means in said cylinder and in the piston mounted therein whereby in one po sition of said piston air may be forced; into said crank cases by said pump device, means in the other Of sftld pistons and the cylinders thereof whereby air under pressure in said crank cases is adapted to pass through said piston and-into said cylinder through intake ports or passages, and the other or first named cylinder being provided with exhaust ports orpassages con-.

trolled by the piston mounted in said cylinder.

'pump device, means for operating said air pump device through said fiy-wheels, means for placing said pump device in communicationwith the crank case-end portion of one of said cylinders, means in said cylinder and in the. piston mountedtherein whereby in one position of said piston air may be forced into said crank cases by said pump device, means in the other of said pistons and the cylinders thereof whereby air under pressure in said crank cases is adapted to pass through saidpiston and into said cylinder through intake ports or passages, the other or first named cylinder being provided with exhaust ports or passages controlled by the :said cylinders and in operative connection ports or p piston meant-ed inswid' cyiindenfand means whereby said piston'will open the exhaustv ssages in advance of the opening of said intake ports or passages. V

r 8. An engine oft the class described-com prisingia pair of cylinders; one of said eylimders being provided with intake ports or.

passages andthe othe rvwith exhaust ports or passages,r crank cases'at the" bottom ofs'aid cylinders and incommunication with each othen pistons mounted insaid cylinders and adapted to control the intake amt oxhaust ports or passages thereofi thepiston :of said last named cylinder being provided with ports or passages adapted to register with air intakeports in said cylinder, means for supplying am to saidair intake ports and through the portsor passages in said iston to said crank cases, said first-named e finder beingprovided with anxiliary ports or pas-- I nc'iofraa sages incommunication with said intake 1 ports" or'passag'e's through an annular bypass, and -thefpistonofsaid cylinder being provided with ports 'ofpassflgeswhikzh open,

inwardly and outwardly therethough and which are adapted to register with the auxil 1 iaryports or passages of said cylinder whereby air under pressure from the crank cases'isadapted to pass through said piston into said cy or passages p In testimony that I claim the foregoing as my invention I havesigned my name in presence of the subscribing witnesses this lnder through said intake ports t 

